Methyl 4-aminobenzoate → HCID 22221092, compound

HRID 1794366Notes

Reaction equation

HRID 1794366 reaction equation
[NH2:1][C:2]1[CH:11]=[CH:10][C:5]([C:6]([O:8][CH3:9])=[O:7])=[CH:4][CH:3]=1.[CH3:12][C:13]1[C:17]([CH2:18][CH2:19][C:20](O)=[O:21])=[C:16]([C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[O:15][N:14]=1.O.ON1C2C=CC=CC=2N=N1.Cl.C(N=C=NCCCN(C)C)C>O.CN(C)C=O>[CH3:9][O:8][C:6]([C:5]1[CH:4]=[CH:3][C:2]([NH:1][C:20](=[O:21])[CH2:19][CH2:18][C:17]2[C:13]([CH3:12])=[N:14][O:15][C:16]=2[C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)=[CH:11][CH:10]=1)=[O:7]

Participants

7

Reactant 4

HCID 12082Methyl 4-aminobenzoateHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 27960291-Hydroxybenzotriazole hydrateHCID 22221207HCID 22221207, compound

Product 1

HCID 22221092HCID 22221092, compoundYield 79.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A mixture of methyl 4-aminobenzoate (0.47 g), 3-(3-methyl-5-phenyl-4-isoxazolyl)propionic acid (0.60 g), 1-hydroxy-1H-1,2,3-benzotriazole hydrate (0.50 g), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (0.61 g) and N,N-dimethylformamide (15 ml) was stirred at room temperature overnight. The reaction mixture was poured into water and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with dilute hydrochloric acid, saturated aqueous sodium hydrogencarbonate and then saturated brine, dried (MgSO4) and concentrated. The residue was subjected to silica gel column chromatography, and N-(4-methoxycarbonylphenyl)-3-(3-methyl-5-phenyl-4-isoxazolyl)propionamide (0.75 g, yield 79%) was obtained as colorless crystals from a fraction eluted with ethyl acetate-hexane (1:1, volume ratio). The crystals were recrystallized from ethyl acetate-hexane. melting point: 140–141° C.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe ethyl acetate layer was washed with dilute hydrochloric acid, saturated aqueous sodium hydrogencarbonate
  3. dry with materialsaturated brine, dried (MgSO4)
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-c39e964c73524e1bbd6bd20c324a551c
Source dataset
uspto-grants-2006_04
Patent number
US07022725B2

Reaction notes

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